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http://dx.doi.org/10.21218/CPR.2019.7.3.061

The Effect of PEDOT:PSS Thickness on the Characteristics of Organic-Inorganic Hybrid Solar Cells  

Kim, Souk Yoon (Department of Display Engineering, Pukyong National University)
Han, Joo Won (Department of Display Engineering, Pukyong National University)
Oh, Joon-Ho (Ulsan Advanced Energy Technology R&D Center, Korea Institute of Energy Research (KIER))
Kim, Yong Hyun (Department of Display Engineering, Pukyong National University)
Publication Information
Current Photovoltaic Research / v.7, no.3, 2019 , pp. 61-64 More about this Journal
Abstract
In this study, we investigate organic-inorganic hybrid solar cells with a very simple three-layer structure (Al/n-Si/PEDOT:PSS). The performance of hybrid solar cells is optimized by controlling the sheet resistance and optical transmittance of the PEDOT:PSS layers. As the thickness of the PEDOT:PSS layer decreases, the optical absorption of the n-Si increases, which greatly improves the short-circuit current density ($J_{SC}$) of devices, but the increase in sheet resistance leads to a decrease in the open-circuit voltage ($V_{OC}$) and the fill factor (FF). The solar cell with the 180-nm thick PEDOT:PSS layer shows a highest efficiency of 8.45% ($V_{OC}$: 0.435 V, $J_{SC}$: $33.7mA/cm^2$, FF: 57.5%). Considering these results, it is expected that the optimizing process for the sheet resistance and transmittance of the PEDOT:PSS layer is essential for producing high-efficiency organic-inorganic hybrid solar cells and will serve as an important basis for achieving low-cost, high-efficiency solar cells.
Keywords
Organic-inorganic solar cells; PEDOT:PSS; Conducting polymer; Hybrid solar cells;
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